Reboot your AmigaONE X1000 and enter the firmware. If you have autoboot set up, press CTRL-C. If you have the latest menu-enabled firmware, press the F key to enter the firmware. In any case, you should end up on the firmware's command prompt which looks like this:

I have just completed step 14. Of autoremove, autoclean, and clean, only the second had an effect.

I did this with Kernel 4.8.0-rc6. When I do step 17 I'll change it to whatever version of 4.9 I have on my CF card, but will it make a difference? As it stands right now, I don't like 17.04 any better than 16.10 and 16.04 will probably remain my primary OS, slightly ahead of AOS4.1. Well, at least I finally figured out how to make the terminal window opaque.

Phoronix wrote:With Debian Stretch dropping 32-bit PowerPC as a release architecture, Ubuntu is following a similar maneuver and will not be making 32-bit PPC images of future releases.

Steve Langasek confirmed 32-bit PowerPC architecture will be removed from future Ubuntu releases. He commented, "the PowerPC port in Ubuntu has reached the end of its useful lifespan...The Technical Board has therefore determined that the powerpc port should not be included in the Ubuntu 17.04 (zesty) release. In support of this, powerpc will be dropped as an architecture in zesty as of Feature Freeze."

PowerPC 32-bit will continue to be supported for existing Ubuntu releases, including Ubuntu 16.04 LTS that still has a few more years of support (2021).

Sad news. That means we won't get an official ubuntu MATE 17.04 release. I will update my installed development version of ubuntu MATE 17.04 as long as possible. After that I will try to release an unofficial ubuntu MATE 17.04 USB img for the X5000 and X1000.